I can't be sure as this is not a chef whose cuisine I particularly like, but 6 would be my guess for Ducasse. (3 for Plaza Athenee; 2 for Louis XV; 1 new star for Bastide. I assume zero for La Celle and, thank goodness, for Spoon). But Ducasse's 6 is not as good as Veyrat's 2*3 (which is really 3, as Auberge is closed when Ferme is open, and vice versa). Note Ramsay has 5 (3 for RHR, 1 for Petrus if you count affiliates and co-owned restaurants, 1 new star for Amaryllis in Glasgow last month). However, I wouldn't put much emphasis on how many "additional" stars a given three-star chef has. That's a function, in large part, of whether the chef has chosen to be low-key and non-commercialized (like Pacaud), not engaging in extracurricular activities, or more profit-oriented and publicity-driven (like Loiseau or Ducasse). Cabrales, I think Ducasse is also behind Il Cortile (the Chanel cafeteria) with 1 Michelin star. But who can keep track these days. I'm thrilled for Guy Savoy, I always thought he was a victim of the Michelin "We don't like people who make money with their name" philosophy because he opened his bistrots. same for Rostang who has been in 2 star limbo for years. Now that Michelin has a British director it may reward chefs for their talent rather than chastise them for their business acumen. The French hate to admit they like to make money.